When_______help, one often says “Thank you.” or “It’s kind of you”. 

In no case _______ go _______ the law of nature or we’ll meet endless suffering．

—I am shocked at the news that many pupils were killed in the terrible traffic accident. —So am I. Little           the safety of the poor children.

Between the two mountains _________ the factory where my father used to work.

Only by practising a few hours every day ________ be able to play the piano well.